package org.eoti.math.cf;

import java.math.BigInteger;
import java.util.ArrayList;

/**
 * The MIT License
 * <p/>
 * Copyright (c) 2009 Malachi de AElfweald (malachid@gmail.com)
 * <p/>
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to the following conditions:
 * <p/>
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
 * Software.
 * <p/>
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
public class SimpleCF
extends ContinuedFraction
{
    private ArrayList<BigInteger> denominators = null;

    public SimpleCF(String normalized)
    {
        this();
        denominators = new ArrayList<BigInteger>();
        String[] pieces = normalized.split("[\\ \\[ \\] \\; \\, \\.]+");
        for(String piece : pieces)
        {
            piece = piece.trim();
            if(piece.length() == 0) continue;
            denominators.add(new BigInteger(piece));
        }
    }

	public SimpleCF(){super();}

    @Override
    public BigInteger getDenominator(BigInteger index) {
        if(denominators == null) return null;
        int idx = index.intValue();
        if(idx >= denominators.size()) return null;
        return denominators.get(idx);
    }

    public BigInteger getNumerator( BigInteger index ){
		return BigInteger.ONE;
	}
}
